Can jukar Spain 45 cal black powder be shot with 45 lead loads?

No, Jukar Spain 45 cal black powder firearms should not be used with modern .45 lead loads, as they are designed for smokeless powder. Black powder firearms require specific black powder loads that match their design and construction. Using smokeless powder or modern lead loads can pose significant safety risks, including potential damage to the firearm and injury to the shooter. Always consult the manufacturer's guidelines and use appropriate ammunition for your firearm.